CDH63NP-1R4MC Equivalent & Substitute Parts

Part Overview

The CDH63NP-1R4MC is a 1.4 µH unshielded wirewound inductor manufactured by Sumida America Components Inc., rated for 2.55 A continuous current with a maximum DC resistance of 35mOhm. This component is classified as obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications requiring fixed inductance values in the 1.4–1.5 µH range with comparable current handling capabilities.

Substiute Parts

CDH63NP-1R4MC

Sumida America Components Inc.In Stock: 879CDH63NP-1R4MC Datasheet

Current PartRFQ

B82462A4152M000

EPCOS - TDK ElectronicsIn Stock: 716B82462A4152M000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDH63NP-1R4MC are identified based on the following critical electrical and mechanical parameters:

Inductance Range: The nominal inductance value of 1.4 µH with ±20% tolerance establishes an acceptable range of 1.12–1.68 µH. Substitute parts must fall within or closely adjacent to this range to maintain circuit performance.

Current Rating: The continuous current rating of 2.55 A and saturation current of 3.2 A define the thermal and magnetic operating envelope. Substitute parts must meet or exceed these ratings to prevent thermal stress and magnetic saturation under specified load conditions.

DC Resistance: The maximum DCR of 35mOhm establishes the upper limit for resistive losses. Lower DCR values in substitute parts improve efficiency and reduce heat dissipation.

Mounting and Package: Surface mount technology with nonstandard package dimensions (0.248" L × 0.240" W × 0.114" H) must be maintained for PCB compatibility.

Environmental Compliance: RoHS3 compliance and MSL 1 rating are mandatory for supply chain and manufacturing process compatibility.

Shielding Configuration: Unshielded construction must be preserved to maintain electromagnetic coupling characteristics in the target application.

The B82462A4152M000 qualifies as a substitute based on inductance proximity (1.5 µH within tolerance range), superior current handling (2.6 A rated, 4.6 A saturation), improved DCR (30mOhm), and active product status with automotive-grade certification (AEC-Q200).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: B82462A4152M000

The B82462A4152M000 manufactured by EPCOS – TDK Electronics is the qualified substitute for the obsolete CDH63NP-1R4MC. Selection is based on the following engineering criteria:

Electrical Compatibility: The inductance value of 1.5 µH represents a 7.1% increase from the original 1.4 µH specification. This variance remains within the ±20% tolerance band and is acceptable for fixed inductor applications where inductance tolerance is the controlling design parameter. The current rating of 2.6 A meets the original 2.55 A requirement with minimal margin, while the saturation current of 4.6 A provides substantial headroom above the original 3.2 A specification. The DC resistance of 30mOhm is superior to the original 35mOhm maximum, reducing resistive losses and thermal generation.

Product Status and Supply Chain: The B82462A4152M000 carries active product status, ensuring continued availability and manufacturing support. The original CDH63NP-1R4MC is classified as obsolete, creating supply risk for new production and field service applications.

Compliance and Certification: Both parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing processes and supply chain requirements. The substitute part carries AEC-Q200 automotive-grade certification, providing additional reliability assurance for mission-critical applications.

Physical Compatibility: Both parts are surface mount components with nonstandard package dimensions. The substitute dimensions (0.236" L × 0.236" W × 0.118" H) are within acceptable tolerance of the original (0.248" L × 0.240" W × 0.114" H), permitting direct PCB footprint compatibility without redesign.

Frequently Asked Questions (FAQ)

Q1: Can the B82462A4152M000 be used as a direct replacement for the CDH63NP-1R4MC without circuit modification?

A: Yes, within the constraints of fixed inductor design. The 1.5 µH inductance of the substitute is 7.1% higher than the original 1.4 µH value but remains within the ±20% tolerance specification. For applications where inductance tolerance is the controlling design parameter, direct substitution is permissible. For circuits with tight inductance requirements, circuit simulation or empirical testing may be necessary to confirm performance margins.

Q2: What is the significance of the improved current rating and saturation current in the substitute part?

A: The B82462A4152M000 provides a continuous current rating of 2.6 A (versus 2.55 A original) and a saturation current of 4.6 A (versus 3.2 A original). These improvements reduce the risk of thermal stress and magnetic saturation under peak load conditions, extending component life and improving circuit reliability. The higher saturation current provides additional design margin for transient current events.

Q3: How does the lower DC resistance of the substitute part affect circuit performance?

A: The B82462A4152M000 has a maximum DC resistance of 30mOhm compared to the original 35mOhm. This 14% reduction in resistive losses decreases power dissipation and heat generation within the inductor. In power conversion and filtering applications, lower DCR improves efficiency and reduces thermal management requirements.

Q4: Are there any package or footprint compatibility concerns when substituting the B82462A4152M000?

A: The substitute part uses a nonstandard surface mount package with dimensions of 0.236" L × 0.236" W × 0.118" H, compared to the original 0.248" L × 0.240" W × 0.114" H. These dimensions are sufficiently similar to permit use of the original PCB footprint without modification. However, verification of clearance margins with adjacent components is recommended during design review.

Q5: Why is the substitute part classified as active while the original is obsolete?

A: The CDH63NP-1R4MC is an obsolete product from Sumida America Components Inc., indicating that manufacturing has been discontinued and long-term supply cannot be guaranteed. The B82462A4152M000 is an active product from EPCOS – TDK Electronics, a major inductor manufacturer with established supply chain infrastructure. Active product status ensures availability for new production and field service applications.

Q6: Does the AEC-Q200 certification of the substitute part provide additional value?

A: AEC-Q200 is an automotive-grade reliability standard that specifies qualification testing for passive components. While the original part does not list this certification, the substitute's AEC-Q200 status indicates compliance with rigorous automotive reliability requirements. This certification is beneficial for applications requiring high reliability, extended temperature operation, or automotive end-use.

Q7: Are there any temperature operating range differences between the two parts?

A: The original CDH63NP-1R4MC does not specify an operating temperature range. The substitute B82462A4152M000 specifies −55°C to +150°C operation. This defined thermal envelope provides design confidence for applications requiring extended temperature operation or thermal cycling resistance.